Windshield wiper



F. 'GL wHlT-rlNGToN WINDSHIELD WIPER May 28, 1929.

original Filed Feb. 9, 1924 2 sheets-sheet 1 Z- f ya,"

May 215;, 1929.

F. G. WHITTINGTON WINDSHIELD wIPER 2 Sheets-Sheff(I 2 Original Filed Feb. 9, 1924 Patented May 28,1929. y

UNITED; STATES PATENT OFFICE.

IFBEDERIX G. WHITTINGTON, OFv EVANSTON, ILLINOIS,'ASSIGNOB TO STEWART- WARNEB SPEEDOMETER CORPORATION, OF CHICAGO, ILLINOIS, A CORPORATION or vrnenvm.

WINDSHIELD WIPEB.

Application led February 9, 1924, Serial No. 691,592. Renewed April 25, 1929A. u

The purpose of this invention is to provide an improved construction of lwindshield wiper and motor foroperating the same, adapted to be mounted on the windshield. It

consist-sin the elements and features of construction shown and described, as indicated in the claims.

In the drawings: Figure l is an outside or front elevation of a. windshield and motor-operated wiper mounted thereon embodied in this invention.

Figure 2 is a similar view showing a slight modification' in respect tothe form of the wiper element.

Figurev 3`is a section at the line, 3 3, on

Figure 2. Figure 4 is a rear end elevation of the motor with the motor casing ,removed and the rear journal bearing bracket broken away to disclose interior parts.

r F'gure 5 is a vertical section at the line` 5 5, on Figure 1, only the casing element of the motorlbeing shown in section, the contentbeing shown in side elevation. F Figure 6 is a section at the line, 6-6, on ig. 5.

`Figure 7 isa detail section at the line, 77, on Figure 1.

Figure 8 is a sectionat the line, 8 8, on Fig. 1, cutting only the windshield, the encased motor being shown in elevation. Figure 9 is a section at the line, 9-9, on Fig. 8.

Figure 10 is a, section at line`10-10 on Fig. 8.

f Figure 11 isa section at line 11-11 on Fig. 10.

Figure 12 is a section at the'line 12,-12, on Figure 11.

IL10 The construction shown in the drawings comprises an electric motor and mechanism actuated thereby for vibrating a wiper memberl over the windshield glass. The electric ymotor and the train of mechanism leading to the. shaft by which the wiper member is vi-r brated are respectively contained inthe two compartments of a case which is partitioned between said compartments so that the compartment containing the train is grease-tight for constituting a lubricant chamber from which the lubricant will not escape into the otherl compartment in which the electric motor with its windings is contained. This casing comprises three parts, rst, the die cast mounting member10, adapted at one side as hereinafter described for mounting on the windshieldv frame, and open at the opposite side except as closed grease-tight by the second part,-the partition, 11, and third, the motor enclosing member, 12, which is L cupshaped sheet metal stamping. The mounting member, 10, of the casing hastwo exterlorly proyecting bosses, 10, which are bored and tapped as seen at 10b for receiving the mounting bolts, 10", 10, setthrough the upper horizontal bar of the windshield frame for clamping the entire casing rigidly' to said bar.' The said mounting member, 10, oblong with roundedcorners, is peripherally rabbeted at the margin of its side oppositesaid bosses for receiving a peripheral iiange, 11, with which the partition, 11, is provided for fitting telescopically about the mounting member to effect a safe grease-tight joint. -Sa-id mounting member is also rabbeted peripherally for receiving outside the iiange, 11, of the partition, 11, the open end of the cup-shaped motor enclosing member. 12, which similarly makes a close telescopic joint both with the member, 10, and the fiange, 11a, of the partition, 11.

The motor is constructed along conventional lines in general, comprising (a) the rotating armature, 20; (b) the xed ield member comprising a laminated core member consisting of multiplicity of lamin, 211 forming the magnetic poles, 2222, with the field windings shown at 23: (c) the commutator seen at` 24, and (d) commutator brushes, 25-25. pivotally mounted at .26 26 and connected for holding them against the rotating commutator. 24. by means of a contractile coil spring', 27. The armature shaft, 28, obtains journal bearing at 10 in the mounting plate, 10, wherein a steel bushing, 30. is inserted to afford said journal bearing and wherein there is also provided an end thrust ball bearing. 31. At the opposite end Said armature shaft is provided with a 'journal bearing, 32. mounted in the head of the case member, 12, and having set through its outer end an adjustable thrust bearing screw, 33, provided with a jam nut, 34; the construction as comprising the thrust bearings, 31 and 33, being adapted to prevent endwise movement, and to take up from time to time the wear which if not compensated by adjustment would tend to make the motor noisy.

f cientlength to extend The partition', 11, is apertured to permit the shaft28, to extend grease-tight through it, being provided at the aperture with a packing gasket, 35, which is accommodated in a slight depression struck in the partition, 11, as seen at 11b around the shaft aperture. The gear train from the armature shaft, 28, cornprises a Worm, 28h, on said shaft which meshes with a worm gear, 29, on ashaft, 29, journaled in the bearings, 10d and lOf, proj ecting inwardly from the mounting member, 10, said shaft,v 29a, carrying a Worm, 36, which meshes with the worm gear, 37, journaled on a stud, 10g, which projects from the inner side of the mounting member, 1G.` The gear, 37, carries a crank wrist, 38, which is connected by a llink, 39, with a lever arm, 4Q, on the wiper operating shaft41. Said shaft, 41, is journaled in a sleeve, 42, mounted rigidly-in the mounting plate, 10, and projecting outwardly therefrom and being of 'suffipast the bosses, 10a, and through the entire thickness of the upper bar, 50, of the windshield frame, said sleeve having suitable 40, is enough greater than the radial distance of the crank wrist, 38, from the axis of the gear Wheel, 37, so that the complete rot-ation of the gear wheel serves only to rock the shaft, 41, through an angle somewhat less windshield glass for wiping the same, as said wiper bar is carried at all times iu a horizontal position through the. path indicated by dotted lines, 67 ,on Figure 1, whereby the face of the windshield is cleaned over substantially its entire ners outside the sleeve of the bar. For attaching the wiper-carrying arms and facilitating such attachment to the shafts, 41, and 60, respectively, said carrying arms are square and there is attached to each of said shafts, 41 and 60, a connector consisting of a bar. 70, folded to form at its lupper end an angular U-shaped hook, 71, which is apertured as seen at 71L through both limbs of the U and which through the bend of the U for clamping the wiper-carrying arm, 61, against the shaft, the lshaft being flatted at both sides for seating at one side against the bar, 61, and the other side engaging the set screw, 72; whereby the journal bearing bushings, i 42a and 42", at opposite ends for journaling. the shaft, 41. The length of the lever arm,

extent except the lower corl1 has a set screw, 72, set

Ytured to admit the contemplated that the wiper will be set snugly and with proper pressure against the glass, by first slacking the set screw, 72, and then sliding the connector, 70, on the shaft to a point at ,which it is judged the pressureof the Wiper on the glass is adequate and not excessive to permit this proper operation.

For nice adjustment of the tension the connector, 70, has a depending arm from whose:k

lower end a lug, 7 0a, projects across in front of the bar, 61, and a tension screw,`75, set

through this lug against said bar being screwed in more or less presses the wiper more or less firmly against the glass.

If 'it is not desired to wipe the entire sury face of the glass, but only to cleanse a limited area directly in front of shaft,`60, and the arm, 61, thereon may be dispensed with, and the other arm, v61, which is carried bythe shaft, 41, may have awiper, 76, pivotally attached at approximately the middle point oft-he length of the wiper to said arm, 61, asseen in Figure 2; any con;

venient means for pivotally attaching the wiper to the arm to adapt the wiper to lac-w' commodate itself to the plane ofthe glass may be employed and the particular pivotal connection shown requires no specific descripllOIl; A v L I claim 1. In a device ofthe class indicated comprising a casing and motor mechanism therei in, adapted tobe mounted on the` frame of the windshield to be served, the motor mechanism comprising a rocking shaft which protrudes forwardly from the casing and extends ,forward past .the plane of the windshield; a wiper arm suspended from the forward end of said rocking shaft, the means of Vsuspension being a bar'folded at its upper end to form a hook embracing the shaft and -apertured at the vhook portion to admit the wiper arm crosswise of. the shaft and screw means at the hook portion for clamping together the wiper arm and the shaft, the lower end of said bar having means for engaging the wiplr arm at a substantial distance from the oo n 2. A device of the class indicated, comprising a casing and `motor mechanism therein, adapted to be mounted on the frame ofthe windshield-to be" served. the motor mechanism comprising a rocking shaft which protrudes forwardly from the casing and extends forward past the plane of the windshield; a wiper arm suspended from the forward end of said rocking shaft, the means of suspension being a bar folded to form at its upper end a U-shaped hook, Vsaid hook being aperwiper arm through both the driver, the rock l limbs of the U, a set screw at the bend of the I U to clamp the wiper arm against the shaft, the lower end of said bar having means for en- 3.v In a device of the class indicated, comprising a casing and motor mechanism therein adapted to be mounted on the frame of the Windshield to be served, the motor mechanism comprising a rocking shaft which pro- -trudes forwardly from the casing and eX- tends forward past the plane of the Windshield; a Wiper arm suspended from the forward end of said rocking shaft the means of suspension being a bar folded at its upper end to form a. hook embracing the shaft and apertured at the hook portion to admit the wiper arm crosswise of the shaft; screw means at the hook portion for clamping togeth'er the Wiper arm and the shaft, and adjustable tensioning means at the lower end of the bar for engaging the Wiper arm at a substantial distance from the hook.

4. In the construction defined in claim 2, foregoing, the means for engaging the Wiper arm at the lower end of the suspending device,

including a lug projecting transversely from said suspending bar, and a set screw in said lug for engaging the Wiper arm for adjustment toward and from the windshield.

In testimony whereof. I have hereunto set my hand at Chicago, Illinois, this 6 day of February, 1924.

FREDERIK G. WHITTINGTON. 

